SDYU001AC June   2015  – November 2025 LSF0101 , LSF0102 , LSF0108 , SN74GTL2014 , SN74HC245 , SN74LS07 , SN74LV123A , SN74LV1T08 , SN74LV1T34 , SN74LV244AT , SN74LV245A , SN74LV4T125 , SN74LVC14A , SN74LVC1G08 , SN74LVC1G125 , SN74LVC245A , SN74LVTH125 , SN74LVTH16244A , SN74LVTH16245A , SN74LVTH245A

 

  1.   1
  2.   Trademarks
  3. 1Introduction
  4. 2Logic Overview
    1. 2.1 Logic Family Quick Reference
    2. 2.2 Comparison of Switching Standards
    3. 2.3 Automotive Logic
    4. 2.4 Ongoing Packaging Investment
    5. 2.5 TI's Programmable Logic Devices: TPLD
    6. 2.6 Function Table
  5. 3Logic Families
    1. 3.1  Legacy Logic
    2. 3.2  AC(T): Advanced CMOS
    3. 3.3  AHC(T): Advanced High-Speed CMOS
    4. 3.4  ALVC: Advanced Low-Voltage CMOS
    5. 3.5  AUC: Advanced Ultra Low Voltage CMOS
    6. 3.6  AUP: Advanced Ultra-Low Power
    7. 3.7  AVC: Advanced Very-Low-Voltage CMOS
    8. 3.8  HC(T): High-Speed CMOS
    9. 3.9  HCS: High-Speed CMOS with Schmitt-trigger inputs
    10. 3.10 LV-A(T): Low Voltage
    11. 3.11 LVxT: Low-Voltage CMOS Single Supply Translating Logic
    12. 3.12 LVC: Low-Voltage CMOS
    13. 3.13 LVT: Low-Voltage BiCMOS Technology
  6. 4Appendix A: Logic Packages
  7. 5Appendix B: Competitor Family Cross Reference
  8. 6Appendix C: Logic Part Number Naming Conventions
  9. 7Appendix D: Standard Logic Functions
  10. 8Revision History

2.2 Comparison of Switching Standards

The following figures provide a comprehensive comparison of different I/O standards for logic devices. Figure 2-2 illustrates the evolution of 5V I/O standards, from traditional TTL devices to advanced CMOS and Schmitt-trigger input devices, highlighting the differences in voltage thresholds and output levels.

Figure 2-3 provides a detailed comparison of multiple voltage standards, including 5V, 3.3V, 2.5V, 1.8V, 1.2V, and 0.8V, enabling easy evaluation and selection of the most appropriate I/O standard for a given application. The graphics show the minimum switching levels (VIH and VIL) for normal operation, as well as the approximate switching threshold (Vt) and output levels (VOH and VOL) for each supply voltage (VCC) specified, enabling designers to make informed decisions about logic device selection.

5V Logic I/O Standards Figure 2-2 5V Logic I/O Standards
CMOS Logic I/O Standards Figure 2-3 CMOS Logic I/O Standards